Links

College & High School

http://library.unm.edu/sora/Auk/v112n02/p0456-p0463.pdf

http://www.springerlink.com/content/r12612v82625n115/

http://icb.oxfordjournals.org/content/41/4/902.full

http://www.bb.iastate.edu/~thorn/www/Publications/pdfFiles/12_Nectar_Chemistry(Proof).pdf

http://www.easternct.edu/~elliottp/documents/Sugar_000.pdf

http://emmanuelsanta.wordpress.com/2009/09/09/differences-in-the-pattern-of-nectar-and-sugar-concentration-among-small-hummingbirds-with-a-short-beak-and-straight-and-the-biggest-hummingbirds-with-long-and-curved-beak-of-puerto-rico/

http://www.sciencedirect.com/science/article/pii/S0300962997002430

Intermediate to High School

http://www.hummingbirds.net/hainsworth.html

http://www.birdfeeders.com/resources/wild-bird-articles/hummingbirds/its-not-all-about-taste-for-hungry-hummingbirds-

http://www.worldofhummingbirds.com/behavior.php

http://mdc.mo.gov/discover-nature/outdoor-recreation/nature-viewing/birding/ruby-throated-hummingbirds

http://www.rubythroat.org/RTHUForagingMain.html